[Computer Exam] 2's complement

[Computer Exam] 2's complement

EX:

The 2's complement of 1

1 = 0001



1 -> 0 , 0 -> 1 <-- This is 1's complement.

1 = 1110



Add 1 to become 2's complement



-1 = 1111



Check table below to find the answer

2's complement	Unsign	sign
1111	15	-1
1110	14	-2
1101	13	-3
1100	12	-4
1011	11	-5
1010	10	-6
1001	9	-7
1000	8	-8
0111	7	7
0110	6	6
0101	5	5
0100	4	4
0011	3	3
0010	2	2
0001	1	1
0000	0	0